Door closer



Dec. 4, 1962 F. J. J. TRAPMAN 3,066,348

DooR CLOSER Filed March 18, 1960 2 Sheets-Sheet l I l I' 24 4" /7 ,'II:`f ll"`` l I l l I l f g l l g l,l Z7 ,f fl, l, g l l l l' L Z @MMM/M,

Dec. 4, 1962 F. J. J. TRAPMAN DOOR CLOSER 2 Sheets-Sheet Filed March 18,1960 W m AU/J n .y .JI-.lil UmuD l d] y 9 www J -,L; s 6 w w 4 JJ VA E n2 rm @W Q m W Unite gates 3,666,348 Patented Dec. 4, 1962 dice 3,656,343DGR CLGSER Franciscus J. J. Trapman, isaae da Ccstralaan 38, Bussum,Netherlands Filed Mar. 18, 1960, Ser. No. 15,854 2 Claims. CL 16-57) Theinvention relates to .a door closer consisting of a U-shaped frame and alever both manufactured in thin stamped metalsheet and rotatably mountedwith respect to each other and provided with a buffer which on one sideis pivoted to the frame and on the other side to the lever, whereas atthe end of the lever a rubber roller is pivoted in a bearing.

Door closers of this kind have generally well satisfied in practice.However they have the disadvantage that as the shafts are bearing in therelatively thin sheet iron of the frame and the lever, the holes after ashort use show a great play so that the frame and the lever must berenewed and thus the whole door closer must be replaced by a new one.Therefore the known door closers are not economical.

It is the main object of the present invention to abolish thisdisadvantage by fixing all rotating shafts or bearings with respect tothe frame and the lever so that these members which are submitted towear can easily and at low cost be replaced by new spares.

Beside the cited advantage the invention offers still The roller of thedoor closer is proinvention will appear from the following descriptionin which on the basis of the drawings a form of embodiment of the doorcloser according to the invention will be explained; in the drawingsare:

FIG. 1 a side View of the complete door closer;

FIG. 2 a cross-section along the line II-II of FIG. 1;

FIG. 3 a side view of the upper rotary shaft of the buffer;

FIG. 4 a side view of the lever;

FIG. 5 a side view of the frame;

FIG. 6 a side view of the screw for fixing one bearing of the lever tothe frame;

FIG. 7 a front View of a bronze ring for one bearing of the lever in theframe;

FIG. 8 a side view of the ring of FIG. 7;

FIG. 9 a side View of the hollow shaft fitting in the ring of FIG. 7;

FIG. l0 an end view of the shaft for the rubber roller;

FIG. 11 a side view of the shaft of FIG. 10;

FIG. l2 a side view of nut for the shaft of FIGS. and 11;

FIG. 13 a front view of the roller; and

FIG. 14 a side view of the roller.

parts of the buffer 27 the spring loaded piston and the inner end of itspiston-rod are not shown, for these parts do not belong to the presentinvention.

door closer according to the invention all bearings or rotating shaftsin which the rotation-angle is large are fixed with respect to the frameor the lever so that the wear in these parts is completely abolished.

FIG. 5 shows a side view of the frame 1, the bores 4 are destined forthe connecting screws on the doorpost. Bore Z is destined for a tap ofthe lower bearing of buffer 27. The rotation angle being small nospecial measures are necessary for those bearings.

The most important bearings are the bearings 3 of the lever 5 in theframe 1 (see FIGS. 1, 2, 4, 6, 7, 8, and 9). In the opening 7 of thelever 5 the ring 19 consisting of sintered bronze powder is placed. Theflange 18 of the ring lies between an inner face of the frame 1 and anouter face of the lever 5, and with the cam 20 of ring 19 fitting in theslot 7 of lever 5 to fix the ring to the lever for rotation therewith.Through the center opening of the ring 19 (see FIGS. 7 Aand 9) thehollow shaft 21 is passed which at the inner side rests with a collaragainst the ring 19. On the other side the shaft 21 is provided with twoflat parts 22 with which the shaft 21 rests against the flat sides 3 ofthe hole 3. The shaft 21 is provided with a threaded bore 23 throughwhich the screw 24 is passed which is fixed by means of a washer on thescrew 24. Thus in practice the bronze ring 19 is fixed in the lever 5 toturn on the shaft 21, which is fixed in one side of the frame 1. Whenthese bearings are worn out only the rings 19 and the shafts 21 have tobe renewed.

The shaft 17 for the upper bearing of the piston rod is provided at oneside with flattened parts 17' fitting in of the lever 5 (see FIG. 4);through these flattened parts a bore has been provided for the passingof a split pin 26 (see FIG. 1). As in this manner the shaft 17 is fixedwith regard to the lever 5 no wear can occur in the lever on this place.

The rubber roller 9 with its mounting parts are shown in FIGS. l, 4, 10,11, 12, 13, and 14. The rubber roller central sleeve 11 turning on thethe lever 5 in the At one side the shaft 12 is provided with a smallerside of the lever of the rubber roller 9 and the hole 6 with theflattening 6 the position of this shaft is lixed by the said leverhaving a hole and a slot therein for receiving said flanged ring, a camon said ring .adapted to be received in the slot in the lever, theflange of the ring being disposed between one leg of the U-shaped frameand the lever, a shaft having a threaded bore adapted for reception insaid flanged ring, said shaft having flattened l? 2. A door closer asdened in claim 1, wherein the roller is provided Awith a shaft having aat side and being threaded at one end and provided with a thickened headat its opposite end, and wherein the lever is provided with a Iholehaving a at side, the hole receiving the shaft with the at side of thelatter in cooperating engagement with 'the flat side of the hole,whereby to resist rotation of the shaft with respect to the lever, and anut turned on to the threaded portion of said shaft to secure thelatter'to said lever.

UNITED STATES PATENTS Stuart June 28, 1887 Lernp July l0, 1906 HuberNov. 20, 1923 Hoen Jan. 15, 1929 Shonnard May 7, 1929 Woernle Dec. 26,1939 Trapman Apr. 4, 1950

